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Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) Technical Abilities 2025 22.04.25 Paper-2 Shift-2 Easy +1 -0.33
Read the given two statements and select the correct option. Statement-I: At constant volume, pressure of a fixed amount of gas varies directly with the temperature. Statement-II: Each line of pressure vs temperature (Kelvin) graph at constant molar volume is called isochore.
Correct Answer: D. Both Statement-I and Statement-II are true. Section : Technical Abilities
Explanation: The provided statements describe fundamental concepts in thermodynamics. Statement-I refers to Amontons's Law (or Gay-Lussac's Law), which states that the pressure of a given mass of gas is directly proportional to its absolute temperature when the volume is kept constant. Statement-II defines an isochore as the line on a graph representing the relationship between pressure and temperature for a gas at a constant molar volume. Since both the physical law and the graphical definition are scientifically accurate, the correct option is that both Statement-I and Statement-II are true.
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